TTC DPO15

Hey I’m DPO15 and I suppose to came on yesterday but didn’t but just last week I was having headaches and lower back pain and I even was having hot flashes then woke up the next day with no hot flashes but was still having headaches and cramping a lot like almost every other day and I normally don’t even cramp when it’s time to come on or while I’m on then Saturday I threw up out of nowhere I don’t know If the food I ate wasn’t sitting right with my stomach or what and now I have to go to the bathroom a lot lately so should I take a pregnancy test now but when I took one last week it said negative maybe I took it too early last week so should I try retesting or just wait to see if I’m going come on🤔